Staphylococcus aureus proteases trigger eosinophil-mediated skin inflammation.
Proc Natl Acad Sci U S A
; 121(6): e2309243121, 2024 Feb 06.
Article
in En
| MEDLINE
| ID: mdl-38289950
ABSTRACT
Staphylococcus aureus skin colonization and eosinophil infiltration are associated with many inflammatory skin disorders, including atopic dermatitis, bullous pemphigoid, Netherton's syndrome, and prurigo nodularis. However, whether there is a relationship between S. aureus and eosinophils and how this interaction influences skin inflammation is largely undefined. We show in a preclinical mouse model that S. aureus epicutaneous exposure induced eosinophil-recruiting chemokines and eosinophil infiltration into the skin. Remarkably, we found that eosinophils had a comparable contribution to the skin inflammation as T cells, in a manner dependent on eosinophil-derived IL-17A and IL-17F production. Importantly, IL-36R signaling induced CCL7-mediated eosinophil recruitment to the inflamed skin. Last, S. aureus proteases induced IL-36α expression in keratinocytes, which promoted infiltration of IL-17-producing eosinophils. Collectively, we uncovered a mechanism for S. aureus proteases to trigger eosinophil-mediated skin inflammation, which has implications in the pathogenesis of inflammatory skin diseases.
Key words
Full text:
1
Database:
MEDLINE
Main subject:
Staphylococcal Infections
/
Dermatitis, Atopic
/
Eosinophilia
Limits:
Animals
Language:
En
Year:
2024
Type:
Article